Wednesday, March 19, 2008

Today March 18/2008 in pre cal 20s we learned how to do factoring.Factoring:We now begin a discussion of the algebraic operation called factoring. Factoring an expression is to rewrite the expression entirely as a polynomial product.Factoring Over the Integer:A polynomial is considered completely factored when there are no more variable factors can be removed. No more integer factor, other than 1 or -1 can be removed. The steps for this process is 1. find the GCF (greatest common factor). 2. What is the GCF of the coefficients (exponents)? 3. What is the GCF of the variables (letters)? 4. Check: Multiply and see if you get the same expression that you started with.Factoring by Grouping?Some polynomials do not have a common factor in all their terms. These polynomials can sometimes be factored by grouping terms that do have a common factor.The assignments we had assigned to us today are: page 120 #11-22 and page 120 #30-36

Wednesday, March 12, 2008

Today in class we learnt how to multiply monomials and polynomials. Basically all you have to do is multiply the monomial outside of the brackets by the polynomial inside the brackets. Ex: Expand 3a(4a-3b) =12a²-9ab

We also learnt how to simplify these expressions. To simplify an expression you, first, expand the expression like we have already done and then, secondly, collect like terms. Ex: Expand and Simplify 4x(2x²+ 5x -3) –(2x²-7) =8x³+20x²-12x-2x²+7 =8x³+18x²-12x+7

The final thing that we learnt to do today was multiplying binomials. When multiplying binomials you use the F.O.I.L. method. The F.O.I.L. method stands for multiplying the First two terms, then multiplying the Outside two terms, then multiplying the Inside two terms, and, finally, multiplying the Last two terms. Ex: Find the product of the binomials (x+6)(x+8) =x²+8x+6x +48 =x²+14x+48 The assignment for today was: pg.107, questions 1-29 odd and pg.108, questions 32-43 and 45-67

Thursday, February 14, 2008

Today we learned about rationalizing radicals when the radical sign is in the demonimator. You do it by multiplying it by a form of 1 such as square 2 over square 2, to move the radical up top. Its a pain in the butt, but its worth it. Todays assignment was page 19 #35-53 odd. Tomorrows scribe is Kara Lee Rae. Haha

Tuesday, February 12, 2008

February 11, 2008

Today in class we learnt how to Simplify Radicals.

Mrs. Remple used a card game at first to help us understand the concept.She handed everyone a few cards from her deck of cards. Everyone organized their cards into pairs of 2. We put all our pairs on the left side of our desk and our extra cards on the right. Then we repeated all this but making sets of 3. It helped show us what happens when we are simplifying radicals.

Here is an example:

²√ 16x³y¹z²= 2∙2∙2∙2∙x∙x∙x∙y∙z∙zThere are two sets of 2s.{2∙2}∙{2∙2}∙x∙x∙x∙y∙z∙zThere is one set of X’s and one X left over. {2∙2}∙{2∙2}∙{x∙x}∙x∙y∙z∙zThere is only one Y, so it is just a left over.There is one set of Z’s with 0 left over.{2∙2}∙{2∙2}∙{x∙x}∙x∙y∙{z∙z}.The simplified answer is:2²xz√xy

Today we learnt about Real Number Stuff. We did questions from the overhead with groups.Some examples of questions were:State wheather each of the following is always true, sometimes true, or never true.The sum of a rational number and an irrational number is:a) Positive: Sometimes Trueb) Irrational: Always Truec) A fraction: Never Trued) Rational: Never Truee) Negative: Sometimes Truef) A whole number: Never True

If you took the absolute value of every number in each of the following sets of numbers, which set of numbers would you obtain?a) Integers: Whole numbersb) Negative integers: Natural numbersc) Whole numbers: Whole numbersd) Real numbers: Positive real numbers and zeroI learnt alot this day ha thanks to Ms. Remple she gave us no homework!

Today, February 7th, in PreCal 20S, we learned about real number lines.

Every real number corresponds to a point on the real number line. There is a one-one correspondence between real numbers and the points on the line. In this real number line, there are no gaps, the line is complete throughout. Example:_________________________________________-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10

When Graphing on a Real Number Line - An open dot means that the point does not include the real number. A closed dot means that the point includes the real number.

Absolute Value

Also, today in class, we learned about absolute value.The absolute value of a real number is the distance from zero to the position of the number on the real number line. When finding the absolute value of a real number, ignore the signs.The notation for absolute value is xExample: -2 = 2 , 2 = 2Example: 2 - -5 , 2 - 5 = -3

Sunday, February 3, 2008

Until the invention of the printing press, scribes were the people that were paid to write or copy books by hand. These were the educated people of their civilizations. In our class, the scribes will be the ones writing the customized textbook for our course.

A Scribe post is a summary of what happened in class. It is filled with enough detail that someone who missed class will be able to catch-up on what they missed. As you are writing your posts ask yourself "Is this entry worthy to be included in our textbook? Would a graphic or example help clarify this topic?" At the end of your scribe post you will name the next scribe and you will tag your post with the date and unit.

I learned about scribe posts from Mr. Kuropatwa at Daniel Mac and Mr. Harbeck at Sargent Park (both schools are in Winnipeg). Once I have learned how to include links, I will give the links to their blogs! The blogs that their students have created have impressed me to the point of making scribe posts a mandatory part of PreCal 20S at Ste. Anne Collegiate.

We will also have pre-service teachers from the University of Regina reading and commenting on your posts. This blog will be as rich and useful as you make it. This will be a place for you to think about your learning and to ask questions of your fellow classmates, the pre-service teachers, me (Mrs. Remple), and the world outside of the halls of SAC.